Repeater Operation; Transmitter Offsets; Selecting The Offset Direction; Automatic Offset Selection - Kenwood TH-78A Instruction Manual

REPEATER OPERATION

1

Transmitter Offsets

All amateur radio repeaters use a separate receive and transmit frequency. The receive frequency may be
above or below the transmit frequency. Most repeater configurations fall into one of the following categories.
Offset
Direction
+
-
2

Selecting the Offset Direction

Press the SHIFT key. The transceiver will shift from one offset direction to the other, such as from + to -, or
from - to simplex where no indicator shows. In the European version (UHF band), - change to - -.
3

Automatic Offset Selection

The TH-78A is programmed according to the standard ARRL (American Radio Relay League) Band Plan for
repeater offset direction. You can override this programming by using the SHIFT key as described in the
preceding paragraph.
•
To cancel automatic offset
Press and hold the BAND key and switch the power on.
This operation switches automatic offset mode on or off.
4

Manual Offset Selection

The factory default sets the automatic offset frequency. You can select any offset frequency in the range 0 to
99.9 MHz in 100 kHz steps.
1) Press and hold the SHIFT/REV key and switch the power on.
2) Press the F key for longer than one second, then press the SHIFT/REV key. The current offset frequency
is shown on the LCD.
3) Rotate the Tuning control, and select the desired offset frequency.
4) Press any front panel key to return to the normal frequency display. To return to the normal offset, reset
the VFO. (see page 15)
Note
Selecting an offset frequency that would result in the radio transmitting outside its intended
range will cause an error tone to be sounded and transmit to be inhibited. Reselect a valid
offset frequency if this occurs.
5

The Reverse Function

Some repeaters use a' reverse pair', that is, the transmit/receive frequencies are the reverse of other repeaters.
VHF Band UHF Band
+600 kHz +5 MHz
-600 kHz -5 MHz
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